CVE-2025-33042: Improper Control of Generation of Code ('Code Injection') vulnerability in Apache Avro Java SDK when generatin

Q: How do I fix CVE-2025-33042?

avro: upgrade to 1.11.5. Exact commands for each OS are on this page.

Q: Is CVE-2025-33042 being exploited?

CVE-2025-33042 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.

Q: What does CVE-2025-33042 affect?

CVE-2025-33042 affects avro. Severity is high (CVSS 7.3). Improper Control of Generation of Code ('Code Injection') vulnerability in Apache Avro Java SDK when generating specific records from untrusted Avro schemas. This issue affects Apache Avro Java SDK: all versions through 1.11.4 and version

Q: How urgent is CVE-2025-33042?

Priority 49/100. High severity; Remotely exploitable, no login, no user action; On your watchlist

This month

HIGH 7.3REMOTEWATCHLISTUPGRADE

CVE-2025-33042 is a high-severity flaw (CVSS 7.3) affecting avro. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

Improper Control of Generation of Code ('Code Injection') vulnerability in Apache Avro Java SDK when generating specific records from untrusted Avro schemas. This issue affects Apache Avro Java SDK: all versions through 1.11.4 and version 1.12.0. Users are recommended to upgrade to version 1.12.1 or 1.11.5, which fix the issue.

Why this priority

High severity
Remotely exploitable, no login, no user action
On your watchlist

A fixed release or distro patch exists.

Risk facts

CVSS score	7.3 (High)
Attack vector	Network (remote)
Attack complexity	Low
Privileges needed	None
User interaction	None
EPSS exploit chance	0.7% (top 48%)
CISA exploited list	No
Weakness	CWE-94
Published	2026-02-13
Last modified	2026-06-17

Publisher (CNA): Apache Software Foundation · Vendor: apache

Last updated 2026-06-17 · Sources: CVE Program, NVD, CISA KEV, EPSS and vendor advisories · How we score

Am I affected?

Timeline

2026-02-13 12:16 UTCPublished CVE record published
2026-06-17 09:13 UTCUpdated Record last modified

apache avro UPGRADE

Affected: < 1.11.5 · 1.12.0 · 1.12.0 rc0 · 1.12.0 rc1

Fixed in: 1.11.5

Safe to downgrade to: no unaffected older release

1. Check installed version

apt-cache policy avro || rpm -q avro || avro --version

2. UPGRADE to 1.11.5 (Debian / Ubuntu)

sudo apt update && sudo apt install --only-upgrade avro

2. UPGRADE (RHEL / Amazon Linux / Fedora)

sudo dnf upgrade avro

Note

Distros often backport fixes without changing the version number. Confirm with the distro advisory or changelog.

Verify at the official source NVD · CVE Program · Report a problem with this page
Scores and fixes here are computed automatically from those and other public sources. Confirm with the vendor advisory before changing production systems.

Quick answers

How do I fix CVE-2025-33042?

avro: upgrade to 1.11.5. Exact commands for each OS are on this page.

Is CVE-2025-33042 being exploited?

CVE-2025-33042 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.

What does CVE-2025-33042 affect?

CVE-2025-33042 affects avro. Severity is high (CVSS 7.3). Improper Control of Generation of Code ('Code Injection') vulnerability in Apache Avro Java SDK when generating specific records from untrusted Avro schemas. This issue affects Apache Avro Java SDK: all versions through 1.11.4 and version

How urgent is CVE-2025-33042?

Priority 49/100. High severity; Remotely exploitable, no login, no user action; On your watchlist

Software pages

Java vulnerabilities

Related CVEs

CVE-2024-47561 HIGH 7.3 UPGRADE MITIGATE Schema parsing in the Java SDK of Apache Avro 1.11.3 and previous versions allows bad actors to execute arbitr

References

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